Oblique electrostatic excitations in a magnetized plasma in the presence of excess superthermal electrons

S. Sultana, I. Kourakis, N. S. Saini, M. A. Hellberg

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165 Scopus citations

Abstract

The nonlinear propagation of ion-acoustic waves is considered in a magnetized plasma, composed of kappa distributed electrons and an inertial ion fluid. The fluid-dynamical system of equations governing the dynamics of ion-acoustic waves is reduced to a pseudoenergy-balance equation. The properties of arbitrary amplitude, obliquely propagating ion-acoustic solitary waves are thus investigated via a mechanical-motion analog (Sagdeev potential) approach. The presence of excess superthermal electrons is shown to influence the nature of magnetized ion-acoustic solitons. The influence on the soliton characteristics of relevant physical parameters such as obliqueness (the angle between soliton propagation direction and magnetic field), the electron deviation from a Maxwellian ("superthermality") and the soliton speed is investigated.

Original languageBritish English
Article number032310
JournalPhysics of Plasmas
Volume17
Issue number3
DOIs
StatePublished - 2010

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